Stove-damper



No. 152 599. Patented Mar. 2|, I899. A. BUGKWALTER.

STOVE DAMPER.

(Application filed July 28, 1898.) (No Model.)

NITED STATES PATENT Fries.

JOSEPH A. BUCKVVALTER, OF ROYERSFORD, PENNSYLVANIA, ASSIGNOR TO THE BUCKWALTER STOVE COMPANY, OF PENNSYLVANIA.

STOVE-DAM PER.

SPECIFICATION forming part Of Letters Patent NO. 621,599, dated March 21, 1899. Application filed July 23, 1898. Serial No. 686,655. (No model.)

To all whom it may concern.-

Be it known that LJosnrn A. BUOKWALTER, a citizen of the United States, residing at Royersford, in the county of Montgomery, State of Pennsylvania, have invented a new and useful Improvement in Stove-Dampers, whichimprovement is fully set forth in the following specification and accompanying drawlngs.

My invention consists of a stove-damper formed of a damper-plate, a seat therefor, and a double-cam head carried by the stem of said face-plate, said head being adapted to rideon a member of the seat, whereby bythe rotation of the plate said head causes the opening of the damper to the proper extent, the rotation of said plate in either direction causing the closing of the damper, when the plate may be locked with said member and prevented from opening.

Figure 1 represents a front view of a stovedamper embodying myinvention. Fig. 2 represents a side elevation. thereof. Fig. 3 represents an irregular section on line 00' 00, Fig. 1. Fig. 4 represents a perspective view of the head of the damper and adjacent portion of the stem which carries the same. Fig. 5 repgesents a section of a portion on line 1 y,

Similar letters of reference indicate corresponding parts in the figures.

Referring to the drawings, A designates the face-plate of a damper, and B designates the seat therefor, the latter being secured to any suitable part of a stove and having therein the draft-passages O, which are on opposite sides of the bridge D of said seat and adapted to be covered by said plate Awhen the damper is in closed condition, as shown in Fig. 2.

E designates a boss which is secured to the bridge D, through the center of which boss and bridge is freely passed the stem F, which projects rearwardly from the face-plate A and whose inner end is connected with the head G, the latter having in its periphery the recess H, which is adapted to receive the tongue J, which projects rearwardly from the bridge D, said head having also on its front face the cam or spiral walls K K, extending in opposite directions, each of said walls beginning at the recess H at the narrowest part of said cam or walls and joining the other at the highest point or rise thereof, forming the shoulder L, it being noticed that the rear end of the tongue J is adapted to ride on either of said walls K and abut against the shoulders L as stops. 4

M designates the handle of the face-plate A for conveniently rotating the latter.

When the damper is open, the plate A is removed from the seat 13 andthe draft-passages C are uncovered. As the head G is connected with the stem F, which carriessaid plate, it abuts against the bridge D and the tongue J occupies the recess H, so that rotation of said head, and consequently of the plate A, is prevented, and thus the damper remains in open condition. In order to close the same, the plate is pushed in to full extent, so that the recess H is removed from the tongue J. The plate A is now turned, whereby either spiral wall K of the head bears against. said tongue and rides on the same, thus moving said head inwardly, and with it thestem F and plate A, forcing the latter on the seat B and covering the passages O,Where-' by the damper is fully closed.

In the rotation of the plate A to close the damper the same may be accomplished to the right or left; but in eithercase when the rotation is completed the shoulder L abuts 2. A stove-damper consisting of a damperplate, a seat therefor provided with a draftpassage, a rotatable stem carrying said plate, a double-cam head on said stem and a member on said plate on which said head may ride, said head having a recess adaptedto receive said member when the damper isopen.

JOSEPH A. BUOKWALTER.

Witnesses:

T. D. BUCKWAL'IER, R. E. SPRINGER. 

